./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:44:55,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:44:55,375 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:44:55,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:44:55,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:44:55,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:44:55,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:44:55,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:44:55,409 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:44:55,409 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:44:55,410 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:44:55,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:44:55,410 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:44:55,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:44:55,410 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:44:55,411 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:44:55,411 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:44:55,412 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:55,412 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:44:55,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:44:55,413 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:44:55,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:44:55,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:44:55,413 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:44:55,413 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:44:55,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:44:55,413 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 [2025-03-08 05:44:55,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:44:55,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:44:55,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:44:55,630 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:44:55,630 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:44:55,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2025-03-08 05:44:56,784 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de42846f8/b404369a825749fbbcfa38b73e42d6f4/FLAG3e2c3e979 [2025-03-08 05:44:56,975 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:44:56,977 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2025-03-08 05:44:56,982 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de42846f8/b404369a825749fbbcfa38b73e42d6f4/FLAG3e2c3e979 [2025-03-08 05:44:57,354 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de42846f8/b404369a825749fbbcfa38b73e42d6f4 [2025-03-08 05:44:57,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:44:57,357 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:44:57,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:57,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:44:57,361 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:44:57,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e42eceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57, skipping insertion in model container [2025-03-08 05:44:57,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,373 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:44:57,471 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2025-03-08 05:44:57,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:57,481 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:44:57,491 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2025-03-08 05:44:57,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:57,501 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:44:57,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57 WrapperNode [2025-03-08 05:44:57,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:57,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:57,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:44:57,503 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:44:57,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,512 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,522 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-08 05:44:57,523 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:57,524 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:44:57,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:44:57,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:44:57,529 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,540 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 05:44:57,541 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,542 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,543 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:44:57,546 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:44:57,547 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:44:57,547 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:44:57,548 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (1/1) ... [2025-03-08 05:44:57,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:57,575 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:44:57,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:44:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:44:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:44:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-08 05:44:57,598 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-08 05:44:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-08 05:44:57,598 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-08 05:44:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:44:57,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:44:57,644 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:44:57,646 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:44:57,717 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-08 05:44:57,738 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-08 05:44:57,745 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-08 05:44:57,746 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:44:57,752 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:44:57,752 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:44:57,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:57 BoogieIcfgContainer [2025-03-08 05:44:57,753 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:44:57,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:44:57,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:44:57,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:44:57,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:44:57" (1/3) ... [2025-03-08 05:44:57,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4395a0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:57, skipping insertion in model container [2025-03-08 05:44:57,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:57" (2/3) ... [2025-03-08 05:44:57,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4395a0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:57, skipping insertion in model container [2025-03-08 05:44:57,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:57" (3/3) ... [2025-03-08 05:44:57,760 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2025-03-08 05:44:57,770 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:44:57,772 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_8-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:44:57,810 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:44:57,818 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f52b0df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:44:57,818 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:44:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:44:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:44:57,825 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:57,825 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:57,825 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:57,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-08 05:44:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:57,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107799709] [2025-03-08 05:44:57,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:57,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:57,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:44:57,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:44:57,901 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:57,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:58,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107799709] [2025-03-08 05:44:58,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107799709] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:58,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:58,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:58,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424492891] [2025-03-08 05:44:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:58,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:58,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:58,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:58,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:58,048 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:58,117 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-03-08 05:44:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-08 05:44:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:58,123 INFO L225 Difference]: With dead ends: 41 [2025-03-08 05:44:58,123 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:44:58,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:58,127 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:58,127 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:44:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:44:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:44:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:44:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:58,155 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-08 05:44:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:58,155 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:58,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:44:58,156 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:58,156 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:58,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:44:58,156 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:58,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-08 05:44:58,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:58,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8274863] [2025-03-08 05:44:58,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:58,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:58,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:44:58,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:44:58,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:58,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:58,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:58,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8274863] [2025-03-08 05:44:58,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8274863] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:58,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:58,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:58,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323836407] [2025-03-08 05:44:58,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:58,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:58,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:58,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:58,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:58,229 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:58,282 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-08 05:44:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 05:44:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:58,283 INFO L225 Difference]: With dead ends: 33 [2025-03-08 05:44:58,283 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:44:58,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:58,284 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:58,284 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:44:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:44:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:44:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 05:44:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:58,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-08 05:44:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:58,289 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:58,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:44:58,290 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:58,290 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:58,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:44:58,290 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:58,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-08 05:44:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:58,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680460906] [2025-03-08 05:44:58,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:58,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:58,300 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:58,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:58,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:58,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680460906] [2025-03-08 05:44:58,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680460906] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708459729] [2025-03-08 05:44:58,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:58,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:58,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:58,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:44:58,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:58,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:58,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:58,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:58,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:58,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:58,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708459729] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:58,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-08 05:44:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136658790] [2025-03-08 05:44:58,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:58,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:44:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:58,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:44:58,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:44:58,704 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:44:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:58,824 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-08 05:44:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:44:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-08 05:44:58,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:58,826 INFO L225 Difference]: With dead ends: 55 [2025-03-08 05:44:58,826 INFO L226 Difference]: Without dead ends: 31 [2025-03-08 05:44:58,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:44:58,828 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:58,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-08 05:44:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-08 05:44:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-08 05:44:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-08 05:44:58,835 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-08 05:44:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:58,835 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-08 05:44:58,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:44:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-08 05:44:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 05:44:58,837 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:58,837 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:58,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:44:59,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:59,038 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:59,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:59,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-08 05:44:59,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:59,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69477713] [2025-03-08 05:44:59,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:59,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:59,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:59,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:59,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:59,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:59,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:59,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69477713] [2025-03-08 05:44:59,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69477713] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:59,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937297597] [2025-03-08 05:44:59,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:59,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:59,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:59,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:44:59,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:59,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:59,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:59,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:59,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:59,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:59,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937297597] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:59,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:59,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-08 05:44:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186818880] [2025-03-08 05:44:59,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:59,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:44:59,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:59,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:44:59,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:44:59,332 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:44:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:59,432 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-08 05:44:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:44:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-08 05:44:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:59,434 INFO L225 Difference]: With dead ends: 40 [2025-03-08 05:44:59,434 INFO L226 Difference]: Without dead ends: 36 [2025-03-08 05:44:59,434 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:44:59,434 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:59,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-08 05:44:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-08 05:44:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-08 05:44:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-08 05:44:59,442 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-08 05:44:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:59,442 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-08 05:44:59,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 05:44:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-08 05:44:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 05:44:59,445 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:59,445 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:59,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:44:59,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 05:44:59,646 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:59,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:59,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-08 05:44:59,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:59,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185000122] [2025-03-08 05:44:59,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:59,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:59,650 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:59,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:59,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:59,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:44:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185000122] [2025-03-08 05:44:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185000122] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079387243] [2025-03-08 05:44:59,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:59,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:59,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:44:59,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:59,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:59,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:59,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:59,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:59,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:44:59,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:45:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079387243] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:00,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-08 05:45:00,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888981386] [2025-03-08 05:45:00,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:00,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 05:45:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:00,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 05:45:00,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:45:00,071 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:45:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:00,201 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-08 05:45:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:45:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-03-08 05:45:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:00,202 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:45:00,202 INFO L226 Difference]: Without dead ends: 38 [2025-03-08 05:45:00,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:00,203 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:00,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-08 05:45:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-08 05:45:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-08 05:45:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-08 05:45:00,208 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-08 05:45:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:00,208 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-08 05:45:00,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:45:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-08 05:45:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:45:00,209 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:00,209 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:00,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 05:45:00,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:00,410 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:00,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:00,410 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-08 05:45:00,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:00,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292873668] [2025-03-08 05:45:00,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:00,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:00,414 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:45:00,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:45:00,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:00,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 05:45:00,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:00,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292873668] [2025-03-08 05:45:00,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292873668] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:00,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934236250] [2025-03-08 05:45:00,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:00,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:00,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:00,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:45:00,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:45:00,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:45:00,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:00,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:00,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:45:00,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:45:00,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:45:00,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934236250] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:00,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:00,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-08 05:45:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134060667] [2025-03-08 05:45:00,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:00,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:45:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:00,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:45:00,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:45:00,849 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:45:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:01,153 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-08 05:45:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:45:01,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-03-08 05:45:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:01,155 INFO L225 Difference]: With dead ends: 101 [2025-03-08 05:45:01,155 INFO L226 Difference]: Without dead ends: 68 [2025-03-08 05:45:01,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:45:01,156 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:01,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:45:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-08 05:45:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-08 05:45:01,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-08 05:45:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-08 05:45:01,164 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-08 05:45:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:01,164 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-08 05:45:01,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-08 05:45:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-08 05:45:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 05:45:01,166 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:01,166 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:01,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 05:45:01,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:01,367 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:01,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:01,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-08 05:45:01,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:01,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669175164] [2025-03-08 05:45:01,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:01,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:01,370 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:45:01,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:45:01,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:01,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 05:45:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669175164] [2025-03-08 05:45:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669175164] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:01,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065286688] [2025-03-08 05:45:01,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:01,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:01,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:01,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:45:01,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:45:01,504 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:45:01,505 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:01,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:01,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:45:01,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-08 05:45:01,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:45:01,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065286688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:01,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:01,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-08 05:45:01,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455397304] [2025-03-08 05:45:01,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:01,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:45:01,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:01,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:45:01,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:01,959 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:45:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:02,116 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-08 05:45:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:45:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-03-08 05:45:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:02,118 INFO L225 Difference]: With dead ends: 102 [2025-03-08 05:45:02,118 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 05:45:02,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:45:02,123 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:02,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 05:45:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-08 05:45:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-08 05:45:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-08 05:45:02,146 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-08 05:45:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:02,146 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-08 05:45:02,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:45:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-08 05:45:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-08 05:45:02,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:02,149 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:02,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 05:45:02,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:02,350 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:02,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-08 05:45:02,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:02,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654712134] [2025-03-08 05:45:02,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:02,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:02,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:45:02,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:45:02,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:02,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-08 05:45:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654712134] [2025-03-08 05:45:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654712134] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671508405] [2025-03-08 05:45:02,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:02,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:02,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:02,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:02,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:45:02,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:45:02,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:45:02,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:02,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:02,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:45:02,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-08 05:45:02,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-08 05:45:03,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671508405] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:03,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:03,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-08 05:45:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666249188] [2025-03-08 05:45:03,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:03,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:45:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:03,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:45:03,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:45:03,356 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-08 05:45:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:03,825 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-08 05:45:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:45:03,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2025-03-08 05:45:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:03,829 INFO L225 Difference]: With dead ends: 177 [2025-03-08 05:45:03,829 INFO L226 Difference]: Without dead ends: 104 [2025-03-08 05:45:03,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:45:03,831 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 97 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:03,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 375 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:45:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-08 05:45:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-08 05:45:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-03-08 05:45:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-08 05:45:03,842 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-08 05:45:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:03,842 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-08 05:45:03,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-08 05:45:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-08 05:45:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-08 05:45:03,844 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:03,845 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:03,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 05:45:04,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:04,049 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:04,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 830576147, now seen corresponding path program 1 times [2025-03-08 05:45:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:04,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242942959] [2025-03-08 05:45:04,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:04,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:04,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-08 05:45:04,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-08 05:45:04,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:04,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 136 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-03-08 05:45:04,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242942959] [2025-03-08 05:45:04,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242942959] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387850980] [2025-03-08 05:45:04,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:45:04,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:04,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:04,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:04,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:45:04,262 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-08 05:45:04,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-08 05:45:04,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:04,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:04,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:04,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 179 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2025-03-08 05:45:04,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 195 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2025-03-08 05:45:05,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387850980] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:05,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:05,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-08 05:45:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849468764] [2025-03-08 05:45:05,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:05,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:45:05,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:05,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:45:05,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:45:05,253 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-08 05:45:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:05,455 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-08 05:45:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:45:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 133 [2025-03-08 05:45:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:05,457 INFO L225 Difference]: With dead ends: 132 [2025-03-08 05:45:05,457 INFO L226 Difference]: Without dead ends: 128 [2025-03-08 05:45:05,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 250 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:45:05,458 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:05,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 214 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-08 05:45:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-08 05:45:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-03-08 05:45:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-08 05:45:05,469 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 133 [2025-03-08 05:45:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:05,469 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-08 05:45:05,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-08 05:45:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-08 05:45:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2025-03-08 05:45:05,472 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:05,473 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 21, 20, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:05,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:05,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:05,675 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:05,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1043998597, now seen corresponding path program 2 times [2025-03-08 05:45:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908212762] [2025-03-08 05:45:05,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:05,707 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-08 05:45:05,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-08 05:45:05,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:05,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-08 05:45:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:06,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908212762] [2025-03-08 05:45:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908212762] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183279210] [2025-03-08 05:45:06,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:06,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:06,093 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:06,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:45:06,152 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-08 05:45:06,220 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-08 05:45:06,220 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:06,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:06,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:45:06,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-08 05:45:06,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 729 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2025-03-08 05:45:07,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183279210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:07,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:07,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 19 [2025-03-08 05:45:07,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3285715] [2025-03-08 05:45:07,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:07,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:45:07,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:07,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:45:07,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:45:07,816 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) [2025-03-08 05:45:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:07,961 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-08 05:45:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:45:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) Word has length 339 [2025-03-08 05:45:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:07,963 INFO L225 Difference]: With dead ends: 148 [2025-03-08 05:45:07,963 INFO L226 Difference]: Without dead ends: 144 [2025-03-08 05:45:07,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 668 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:07,964 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:07,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 196 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-08 05:45:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-08 05:45:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-03-08 05:45:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-08 05:45:07,984 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 339 [2025-03-08 05:45:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:07,986 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-08 05:45:07,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) [2025-03-08 05:45:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-08 05:45:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2025-03-08 05:45:07,991 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:07,991 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:07,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 05:45:08,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:45:08,192 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:08,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2035580874, now seen corresponding path program 3 times [2025-03-08 05:45:08,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:08,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490142095] [2025-03-08 05:45:08,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:08,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:08,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 445 statements into 28 equivalence classes. [2025-03-08 05:45:08,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 445 statements. [2025-03-08 05:45:08,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:45:08,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 885 proven. 94 refuted. 0 times theorem prover too weak. 4702 trivial. 0 not checked. [2025-03-08 05:45:08,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:08,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490142095] [2025-03-08 05:45:08,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490142095] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:08,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652664571] [2025-03-08 05:45:08,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:08,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:08,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:08,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:45:08,484 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 445 statements into 28 equivalence classes. [2025-03-08 05:45:08,518 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 445 statements. [2025-03-08 05:45:08,518 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:45:08,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:08,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:08,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 989 proven. 96 refuted. 0 times theorem prover too weak. 4596 trivial. 0 not checked. [2025-03-08 05:45:08,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 989 proven. 99 refuted. 0 times theorem prover too weak. 4593 trivial. 0 not checked. [2025-03-08 05:45:09,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652664571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:09,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:09,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 22 [2025-03-08 05:45:09,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37516144] [2025-03-08 05:45:09,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:09,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:45:09,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:09,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:45:09,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:45:09,821 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2025-03-08 05:45:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:10,129 INFO L93 Difference]: Finished difference Result 264 states and 533 transitions. [2025-03-08 05:45:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:45:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) Word has length 445 [2025-03-08 05:45:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:10,131 INFO L225 Difference]: With dead ends: 264 [2025-03-08 05:45:10,131 INFO L226 Difference]: Without dead ends: 152 [2025-03-08 05:45:10,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 876 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:45:10,133 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:10,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 191 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:45:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-08 05:45:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 129. [2025-03-08 05:45:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 86 states have (on average 1.127906976744186) internal successors, (97), 85 states have internal predecessors, (97), 22 states have call successors, (22), 11 states have call predecessors, (22), 20 states have return successors, (97), 32 states have call predecessors, (97), 22 states have call successors, (97) [2025-03-08 05:45:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 216 transitions. [2025-03-08 05:45:10,154 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 216 transitions. Word has length 445 [2025-03-08 05:45:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:10,154 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 216 transitions. [2025-03-08 05:45:10,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2025-03-08 05:45:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 216 transitions. [2025-03-08 05:45:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2025-03-08 05:45:10,160 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:10,160 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 31, 31, 27, 27, 19, 19, 19, 19, 19, 19, 19, 15, 15, 15, 15, 15, 15, 15, 12, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:10,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:10,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:10,364 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:10,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1270899852, now seen corresponding path program 4 times [2025-03-08 05:45:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:10,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679199453] [2025-03-08 05:45:10,364 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:10,375 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 472 statements into 2 equivalence classes. [2025-03-08 05:45:10,394 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 401 of 472 statements. [2025-03-08 05:45:10,394 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:10,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6478 backedges. 209 proven. 946 refuted. 0 times theorem prover too weak. 5323 trivial. 0 not checked. [2025-03-08 05:45:10,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:10,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679199453] [2025-03-08 05:45:10,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679199453] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:10,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886602747] [2025-03-08 05:45:10,711 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:10,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:10,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:45:10,801 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 472 statements into 2 equivalence classes. [2025-03-08 05:45:10,865 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 401 of 472 statements. [2025-03-08 05:45:10,865 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:10,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:10,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:45:10,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6478 backedges. 209 proven. 946 refuted. 0 times theorem prover too weak. 5323 trivial. 0 not checked. [2025-03-08 05:45:10,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6478 backedges. 209 proven. 967 refuted. 0 times theorem prover too weak. 5302 trivial. 0 not checked. [2025-03-08 05:45:12,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886602747] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:12,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:12,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 19 [2025-03-08 05:45:12,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051047583] [2025-03-08 05:45:12,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:12,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:45:12,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:12,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:45:12,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:45:12,646 INFO L87 Difference]: Start difference. First operand 129 states and 216 transitions. Second operand has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) [2025-03-08 05:45:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:12,823 INFO L93 Difference]: Finished difference Result 170 states and 334 transitions. [2025-03-08 05:45:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:45:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) Word has length 472 [2025-03-08 05:45:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:12,827 INFO L225 Difference]: With dead ends: 170 [2025-03-08 05:45:12,827 INFO L226 Difference]: Without dead ends: 166 [2025-03-08 05:45:12,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 934 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:12,829 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:12,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 180 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-03-08 05:45:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2025-03-08 05:45:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.118279569892473) internal successors, (104), 92 states have internal predecessors, (104), 25 states have call successors, (25), 11 states have call predecessors, (25), 22 states have return successors, (121), 37 states have call predecessors, (121), 25 states have call successors, (121) [2025-03-08 05:45:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 250 transitions. [2025-03-08 05:45:12,844 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 250 transitions. Word has length 472 [2025-03-08 05:45:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:12,846 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 250 transitions. [2025-03-08 05:45:12,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) [2025-03-08 05:45:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 250 transitions. [2025-03-08 05:45:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2025-03-08 05:45:12,849 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:12,849 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 29, 29, 28, 24, 19, 19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 14, 14, 14, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:12,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:13,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 05:45:13,054 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:13,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:13,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1935432583, now seen corresponding path program 5 times [2025-03-08 05:45:13,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:13,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055025066] [2025-03-08 05:45:13,054 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:13,066 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 458 statements into 29 equivalence classes. [2025-03-08 05:45:13,072 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 89 of 458 statements. [2025-03-08 05:45:13,072 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:45:13,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 281 proven. 545 refuted. 0 times theorem prover too weak. 5312 trivial. 0 not checked. [2025-03-08 05:45:13,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:13,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055025066] [2025-03-08 05:45:13,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055025066] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:13,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062238112] [2025-03-08 05:45:13,138 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:13,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:13,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:13,140 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:13,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:45:13,231 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 458 statements into 29 equivalence classes. [2025-03-08 05:45:13,246 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 89 of 458 statements. [2025-03-08 05:45:13,246 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:45:13,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:13,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:45:13,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 2590 proven. 6 refuted. 0 times theorem prover too weak. 3542 trivial. 0 not checked. [2025-03-08 05:45:13,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 313 proven. 645 refuted. 0 times theorem prover too weak. 5180 trivial. 0 not checked. [2025-03-08 05:45:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062238112] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:14,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:14,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-03-08 05:45:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734162914] [2025-03-08 05:45:14,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:14,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:45:14,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:14,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:45:14,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:45:14,213 INFO L87 Difference]: Start difference. First operand 141 states and 250 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 15 states have internal predecessors, (61), 7 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (20), 4 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-08 05:45:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:14,307 INFO L93 Difference]: Finished difference Result 253 states and 478 transitions. [2025-03-08 05:45:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:45:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 15 states have internal predecessors, (61), 7 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (20), 4 states have call predecessors, (20), 7 states have call successors, (20) Word has length 458 [2025-03-08 05:45:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:14,309 INFO L225 Difference]: With dead ends: 253 [2025-03-08 05:45:14,309 INFO L226 Difference]: Without dead ends: 120 [2025-03-08 05:45:14,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 906 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:45:14,310 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:14,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 177 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-03-08 05:45:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2025-03-08 05:45:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 79 states have internal predecessors, (93), 20 states have call successors, (20), 13 states have call predecessors, (20), 17 states have return successors, (72), 27 states have call predecessors, (72), 20 states have call successors, (72) [2025-03-08 05:45:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 185 transitions. [2025-03-08 05:45:14,318 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 185 transitions. Word has length 458 [2025-03-08 05:45:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:14,318 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 185 transitions. [2025-03-08 05:45:14,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 15 states have internal predecessors, (61), 7 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (20), 4 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-08 05:45:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 185 transitions. [2025-03-08 05:45:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2025-03-08 05:45:14,320 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:14,320 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 22, 21, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:14,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 05:45:14,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 05:45:14,521 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:14,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 477253646, now seen corresponding path program 6 times [2025-03-08 05:45:14,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:14,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845472445] [2025-03-08 05:45:14,522 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:14,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:14,530 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 365 statements into 21 equivalence classes. [2025-03-08 05:45:14,532 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 32 of 365 statements. [2025-03-08 05:45:14,532 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 05:45:14,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3769 backedges. 208 proven. 544 refuted. 0 times theorem prover too weak. 3017 trivial. 0 not checked. [2025-03-08 05:45:14,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:14,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845472445] [2025-03-08 05:45:14,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845472445] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:14,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55300254] [2025-03-08 05:45:14,608 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:14,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:14,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:14,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:45:14,700 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 365 statements into 21 equivalence classes. [2025-03-08 05:45:14,706 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 32 of 365 statements. [2025-03-08 05:45:14,707 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 05:45:14,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:14,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:45:14,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3769 backedges. 1089 proven. 13 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2025-03-08 05:45:14,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3769 backedges. 208 proven. 544 refuted. 0 times theorem prover too weak. 3017 trivial. 0 not checked. [2025-03-08 05:45:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55300254] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:15,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2025-03-08 05:45:15,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498875263] [2025-03-08 05:45:15,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:15,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:45:15,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:15,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:45:15,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:15,536 INFO L87 Difference]: Start difference. First operand 120 states and 185 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2025-03-08 05:45:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:15,623 INFO L93 Difference]: Finished difference Result 225 states and 374 transitions. [2025-03-08 05:45:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:45:15,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 365 [2025-03-08 05:45:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:15,624 INFO L225 Difference]: With dead ends: 225 [2025-03-08 05:45:15,624 INFO L226 Difference]: Without dead ends: 113 [2025-03-08 05:45:15,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 720 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:45:15,625 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:15,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 177 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-03-08 05:45:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2025-03-08 05:45:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 78 states have (on average 1.141025641025641) internal successors, (89), 75 states have internal predecessors, (89), 18 states have call successors, (18), 13 states have call predecessors, (18), 16 states have return successors, (56), 24 states have call predecessors, (56), 18 states have call successors, (56) [2025-03-08 05:45:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2025-03-08 05:45:15,633 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 365 [2025-03-08 05:45:15,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:15,634 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2025-03-08 05:45:15,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 8 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2025-03-08 05:45:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2025-03-08 05:45:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2025-03-08 05:45:15,635 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:15,636 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 29, 29, 26, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:15,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:45:15,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 05:45:15,840 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:15,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash -646083584, now seen corresponding path program 7 times [2025-03-08 05:45:15,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:15,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106597556] [2025-03-08 05:45:15,840 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:15,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:15,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 419 statements into 1 equivalence classes. [2025-03-08 05:45:15,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 419 of 419 statements. [2025-03-08 05:45:15,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:15,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5030 backedges. 224 proven. 676 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2025-03-08 05:45:16,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:16,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106597556] [2025-03-08 05:45:16,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106597556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531957575] [2025-03-08 05:45:16,100 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:16,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:16,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:16,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:16,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:45:16,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 419 statements into 1 equivalence classes. [2025-03-08 05:45:16,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 419 of 419 statements. [2025-03-08 05:45:16,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:16,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:16,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:16,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5030 backedges. 224 proven. 676 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2025-03-08 05:45:16,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5030 backedges. 224 proven. 692 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2025-03-08 05:45:17,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531957575] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:17,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:17,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 17 [2025-03-08 05:45:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913878704] [2025-03-08 05:45:17,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:17,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:45:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:17,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:45:17,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:45:17,570 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2025-03-08 05:45:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:17,698 INFO L93 Difference]: Finished difference Result 145 states and 244 transitions. [2025-03-08 05:45:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:45:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) Word has length 419 [2025-03-08 05:45:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:17,700 INFO L225 Difference]: With dead ends: 145 [2025-03-08 05:45:17,700 INFO L226 Difference]: Without dead ends: 141 [2025-03-08 05:45:17,701 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 829 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:45:17,701 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:17,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 143 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-08 05:45:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2025-03-08 05:45:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.139240506329114) internal successors, (90), 76 states have internal predecessors, (90), 19 states have call successors, (19), 13 states have call predecessors, (19), 16 states have return successors, (62), 25 states have call predecessors, (62), 19 states have call successors, (62) [2025-03-08 05:45:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 171 transitions. [2025-03-08 05:45:17,713 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 171 transitions. Word has length 419 [2025-03-08 05:45:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:17,714 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 171 transitions. [2025-03-08 05:45:17,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2025-03-08 05:45:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 171 transitions. [2025-03-08 05:45:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-08 05:45:17,716 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:17,716 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 34, 34, 30, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 13, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:17,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 05:45:17,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 05:45:17,916 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:17,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1660311944, now seen corresponding path program 8 times [2025-03-08 05:45:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925929549] [2025-03-08 05:45:17,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:17,934 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 487 statements into 2 equivalence classes. [2025-03-08 05:45:17,960 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 487 of 487 statements. [2025-03-08 05:45:17,960 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:17,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6850 backedges. 319 proven. 974 refuted. 0 times theorem prover too weak. 5557 trivial. 0 not checked. [2025-03-08 05:45:18,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925929549] [2025-03-08 05:45:18,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925929549] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609797767] [2025-03-08 05:45:18,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:18,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:18,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:18,287 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:45:18,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 487 statements into 2 equivalence classes. [2025-03-08 05:45:18,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 487 of 487 statements. [2025-03-08 05:45:18,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:18,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:18,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:45:18,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6850 backedges. 329 proven. 1065 refuted. 0 times theorem prover too weak. 5456 trivial. 0 not checked. [2025-03-08 05:45:18,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6850 backedges. 333 proven. 1091 refuted. 0 times theorem prover too weak. 5426 trivial. 0 not checked. [2025-03-08 05:45:20,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609797767] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:20,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:20,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-03-08 05:45:20,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604353660] [2025-03-08 05:45:20,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:20,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:45:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:20,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:45:20,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:45:20,523 INFO L87 Difference]: Start difference. First operand 115 states and 171 transitions. Second operand has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 18 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (29), 12 states have call predecessors, (29), 18 states have call successors, (29) [2025-03-08 05:45:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:20,800 INFO L93 Difference]: Finished difference Result 171 states and 340 transitions. [2025-03-08 05:45:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:45:20,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 18 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (29), 12 states have call predecessors, (29), 18 states have call successors, (29) Word has length 487 [2025-03-08 05:45:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:20,802 INFO L225 Difference]: With dead ends: 171 [2025-03-08 05:45:20,802 INFO L226 Difference]: Without dead ends: 118 [2025-03-08 05:45:20,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 960 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:45:20,803 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:20,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 486 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:45:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-08 05:45:20,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2025-03-08 05:45:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 78 states have internal predecessors, (92), 19 states have call successors, (19), 13 states have call predecessors, (19), 17 states have return successors, (51), 26 states have call predecessors, (51), 19 states have call successors, (51) [2025-03-08 05:45:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2025-03-08 05:45:20,823 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 487 [2025-03-08 05:45:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:20,824 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2025-03-08 05:45:20,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 18 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (29), 12 states have call predecessors, (29), 18 states have call successors, (29) [2025-03-08 05:45:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2025-03-08 05:45:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2025-03-08 05:45:20,826 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:20,826 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 42, 42, 35, 34, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 14, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:20,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 05:45:21,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:21,027 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:21,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1547532263, now seen corresponding path program 9 times [2025-03-08 05:45:21,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:21,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138649913] [2025-03-08 05:45:21,028 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:21,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:21,040 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 595 statements into 36 equivalence classes. [2025-03-08 05:45:21,049 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 118 of 595 statements. [2025-03-08 05:45:21,049 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 05:45:21,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10324 backedges. 1284 proven. 56 refuted. 0 times theorem prover too weak. 8984 trivial. 0 not checked. [2025-03-08 05:45:21,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:21,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138649913] [2025-03-08 05:45:21,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138649913] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:21,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278794258] [2025-03-08 05:45:21,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:21,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:21,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:21,192 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:21,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:45:21,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 595 statements into 36 equivalence classes. [2025-03-08 05:45:21,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 118 of 595 statements. [2025-03-08 05:45:21,356 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 05:45:21,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:21,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:45:21,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10324 backedges. 2055 proven. 34 refuted. 0 times theorem prover too weak. 8235 trivial. 0 not checked. [2025-03-08 05:45:21,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10324 backedges. 1421 proven. 73 refuted. 0 times theorem prover too weak. 8830 trivial. 0 not checked. [2025-03-08 05:45:22,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278794258] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:22,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:22,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 21 [2025-03-08 05:45:22,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686410007] [2025-03-08 05:45:22,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:22,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:45:22,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:22,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:45:22,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:45:22,798 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 13 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) [2025-03-08 05:45:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:22,970 INFO L93 Difference]: Finished difference Result 225 states and 325 transitions. [2025-03-08 05:45:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:45:22,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 13 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) Word has length 595 [2025-03-08 05:45:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:22,972 INFO L225 Difference]: With dead ends: 225 [2025-03-08 05:45:22,972 INFO L226 Difference]: Without dead ends: 117 [2025-03-08 05:45:22,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1176 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:45:22,973 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:22,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 186 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-03-08 05:45:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2025-03-08 05:45:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 18 states have call successors, (18), 11 states have call predecessors, (18), 16 states have return successors, (42), 24 states have call predecessors, (42), 18 states have call successors, (42) [2025-03-08 05:45:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2025-03-08 05:45:22,981 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 142 transitions. Word has length 595 [2025-03-08 05:45:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:22,982 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 142 transitions. [2025-03-08 05:45:22,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 13 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) [2025-03-08 05:45:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 142 transitions. [2025-03-08 05:45:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2025-03-08 05:45:22,984 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:22,984 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 26, 26, 24, 22, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 11, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:22,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:23,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 05:45:23,185 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:23,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:23,185 INFO L85 PathProgramCache]: Analyzing trace with hash -157652493, now seen corresponding path program 10 times [2025-03-08 05:45:23,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:23,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182846707] [2025-03-08 05:45:23,185 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:23,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:23,194 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 392 statements into 2 equivalence classes. [2025-03-08 05:45:23,206 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 333 of 392 statements. [2025-03-08 05:45:23,207 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:23,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 363 proven. 514 refuted. 0 times theorem prover too weak. 3522 trivial. 0 not checked. [2025-03-08 05:45:23,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:23,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182846707] [2025-03-08 05:45:23,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182846707] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:23,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606822640] [2025-03-08 05:45:23,428 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:23,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:23,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:23,430 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:23,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:45:23,573 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 392 statements into 2 equivalence classes. [2025-03-08 05:45:23,620 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 333 of 392 statements. [2025-03-08 05:45:23,620 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:23,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:23,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:45:23,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 425 proven. 657 refuted. 0 times theorem prover too weak. 3317 trivial. 0 not checked. [2025-03-08 05:45:23,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 427 proven. 685 refuted. 0 times theorem prover too weak. 3287 trivial. 0 not checked. [2025-03-08 05:45:25,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606822640] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:25,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:25,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 25 [2025-03-08 05:45:25,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356836810] [2025-03-08 05:45:25,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:25,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 05:45:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:25,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 05:45:25,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:25,550 INFO L87 Difference]: Start difference. First operand 109 states and 142 transitions. Second operand has 25 states, 24 states have (on average 3.375) internal successors, (81), 25 states have internal predecessors, (81), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-08 05:45:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:25,728 INFO L93 Difference]: Finished difference Result 129 states and 174 transitions. [2025-03-08 05:45:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:45:25,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.375) internal successors, (81), 25 states have internal predecessors, (81), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) Word has length 392 [2025-03-08 05:45:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:25,729 INFO L225 Difference]: With dead ends: 129 [2025-03-08 05:45:25,729 INFO L226 Difference]: Without dead ends: 109 [2025-03-08 05:45:25,730 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 767 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:45:25,730 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:25,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 456 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2025-03-08 05:45:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2025-03-08 05:45:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 18 states have call successors, (18), 11 states have call predecessors, (18), 16 states have return successors, (41), 24 states have call predecessors, (41), 18 states have call successors, (41) [2025-03-08 05:45:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2025-03-08 05:45:25,737 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 392 [2025-03-08 05:45:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:25,737 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2025-03-08 05:45:25,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.375) internal successors, (81), 25 states have internal predecessors, (81), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-08 05:45:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2025-03-08 05:45:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-08 05:45:25,739 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:25,739 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 34, 34, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:25,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 05:45:25,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 05:45:25,940 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:25,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1424997051, now seen corresponding path program 11 times [2025-03-08 05:45:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:25,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787239985] [2025-03-08 05:45:25,941 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:25,951 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 32 equivalence classes. [2025-03-08 05:45:25,980 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 382 of 487 statements. [2025-03-08 05:45:25,980 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-08 05:45:25,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 512 proven. 886 refuted. 0 times theorem prover too weak. 5450 trivial. 0 not checked. [2025-03-08 05:45:26,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:26,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787239985] [2025-03-08 05:45:26,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787239985] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92348529] [2025-03-08 05:45:26,229 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:26,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:26,231 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:26,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:45:26,381 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 32 equivalence classes. [2025-03-08 05:45:26,457 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 382 of 487 statements. [2025-03-08 05:45:26,457 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-08 05:45:26,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:26,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:45:26,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 3907 proven. 174 refuted. 0 times theorem prover too weak. 2767 trivial. 0 not checked. [2025-03-08 05:45:26,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 512 proven. 894 refuted. 0 times theorem prover too weak. 5442 trivial. 0 not checked. [2025-03-08 05:45:27,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92348529] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:27,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:27,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 21 [2025-03-08 05:45:27,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797471834] [2025-03-08 05:45:27,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:27,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:45:27,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:27,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:45:27,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:45:27,837 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 14 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (30), 13 states have call predecessors, (30), 14 states have call successors, (30) [2025-03-08 05:45:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:28,224 INFO L93 Difference]: Finished difference Result 291 states and 473 transitions. [2025-03-08 05:45:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:45:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 14 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (30), 13 states have call predecessors, (30), 14 states have call successors, (30) Word has length 487 [2025-03-08 05:45:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:28,229 INFO L225 Difference]: With dead ends: 291 [2025-03-08 05:45:28,229 INFO L226 Difference]: Without dead ends: 182 [2025-03-08 05:45:28,230 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 962 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 05:45:28,231 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:28,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 364 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:45:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2025-03-08 05:45:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2025-03-08 05:45:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 110 states have internal predecessors, (125), 29 states have call successors, (29), 17 states have call predecessors, (29), 24 states have return successors, (104), 40 states have call predecessors, (104), 29 states have call successors, (104) [2025-03-08 05:45:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 258 transitions. [2025-03-08 05:45:28,249 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 258 transitions. Word has length 487 [2025-03-08 05:45:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:28,249 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 258 transitions. [2025-03-08 05:45:28,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 14 states have call successors, (27), 2 states have call predecessors, (27), 9 states have return successors, (30), 13 states have call predecessors, (30), 14 states have call successors, (30) [2025-03-08 05:45:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 258 transitions. [2025-03-08 05:45:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2025-03-08 05:45:28,252 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:28,252 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 21, 19, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:28,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 05:45:28,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:28,456 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:28,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -945416372, now seen corresponding path program 12 times [2025-03-08 05:45:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243530472] [2025-03-08 05:45:28,458 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:28,474 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 338 statements into 23 equivalence classes. [2025-03-08 05:45:28,510 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 244 of 338 statements. [2025-03-08 05:45:28,511 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-08 05:45:28,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 706 proven. 133 refuted. 0 times theorem prover too weak. 2374 trivial. 0 not checked. [2025-03-08 05:45:28,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:28,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243530472] [2025-03-08 05:45:28,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243530472] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:28,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448925296] [2025-03-08 05:45:28,671 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:28,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:28,673 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:28,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:45:28,811 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 338 statements into 23 equivalence classes. [2025-03-08 05:45:28,852 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 244 of 338 statements. [2025-03-08 05:45:28,852 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-08 05:45:28,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:28,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:28,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 1269 proven. 57 refuted. 0 times theorem prover too weak. 1887 trivial. 0 not checked. [2025-03-08 05:45:28,890 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3213 backedges. 702 proven. 138 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2025-03-08 05:45:29,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448925296] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:29,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:29,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 21 [2025-03-08 05:45:29,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592458743] [2025-03-08 05:45:29,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:29,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:45:29,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:29,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:45:29,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:45:29,857 INFO L87 Difference]: Start difference. First operand 168 states and 258 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 16 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (29), 10 states have call predecessors, (29), 16 states have call successors, (29) [2025-03-08 05:45:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:30,106 INFO L93 Difference]: Finished difference Result 332 states and 559 transitions. [2025-03-08 05:45:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 05:45:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 16 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (29), 10 states have call predecessors, (29), 16 states have call successors, (29) Word has length 338 [2025-03-08 05:45:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:30,108 INFO L225 Difference]: With dead ends: 332 [2025-03-08 05:45:30,108 INFO L226 Difference]: Without dead ends: 159 [2025-03-08 05:45:30,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 664 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:45:30,110 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:30,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 307 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:45:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-03-08 05:45:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2025-03-08 05:45:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 104 states have internal predecessors, (118), 27 states have call successors, (27), 17 states have call predecessors, (27), 22 states have return successors, (86), 36 states have call predecessors, (86), 27 states have call successors, (86) [2025-03-08 05:45:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 231 transitions. [2025-03-08 05:45:30,121 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 231 transitions. Word has length 338 [2025-03-08 05:45:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:30,121 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 231 transitions. [2025-03-08 05:45:30,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 16 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (29), 10 states have call predecessors, (29), 16 states have call successors, (29) [2025-03-08 05:45:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 231 transitions. [2025-03-08 05:45:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2025-03-08 05:45:30,124 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:30,124 INFO L218 NwaCegarLoop]: trace histogram [45, 45, 40, 40, 35, 35, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 15, 13, 10, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:30,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 05:45:30,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:30,325 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:30,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash -819388808, now seen corresponding path program 13 times [2025-03-08 05:45:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:30,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125134830] [2025-03-08 05:45:30,325 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:30,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:30,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 584 statements into 1 equivalence classes. [2025-03-08 05:45:30,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 584 of 584 statements. [2025-03-08 05:45:30,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:30,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9954 backedges. 278 proven. 808 refuted. 0 times theorem prover too weak. 8868 trivial. 0 not checked. [2025-03-08 05:45:30,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:30,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125134830] [2025-03-08 05:45:30,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125134830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:30,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4481795] [2025-03-08 05:45:30,616 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:30,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:30,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:30,618 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:30,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 05:45:30,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 584 statements into 1 equivalence classes. [2025-03-08 05:45:30,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 584 of 584 statements. [2025-03-08 05:45:30,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:30,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:30,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:30,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9954 backedges. 305 proven. 986 refuted. 0 times theorem prover too weak. 8663 trivial. 0 not checked. [2025-03-08 05:45:30,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9954 backedges. 307 proven. 1000 refuted. 0 times theorem prover too weak. 8647 trivial. 0 not checked. [2025-03-08 05:45:32,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4481795] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:32,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:32,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 18 [2025-03-08 05:45:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669798564] [2025-03-08 05:45:32,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:32,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:45:32,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:32,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:45:32,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:45:32,291 INFO L87 Difference]: Start difference. First operand 158 states and 231 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:45:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:32,400 INFO L93 Difference]: Finished difference Result 177 states and 270 transitions. [2025-03-08 05:45:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:45:32,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) Word has length 584 [2025-03-08 05:45:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:32,403 INFO L225 Difference]: With dead ends: 177 [2025-03-08 05:45:32,403 INFO L226 Difference]: Without dead ends: 166 [2025-03-08 05:45:32,403 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1184 GetRequests, 1156 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:45:32,404 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:32,404 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 158 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-03-08 05:45:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 148. [2025-03-08 05:45:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 98 states have internal predecessors, (112), 25 states have call successors, (25), 17 states have call predecessors, (25), 20 states have return successors, (66), 32 states have call predecessors, (66), 25 states have call successors, (66) [2025-03-08 05:45:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 203 transitions. [2025-03-08 05:45:32,414 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 203 transitions. Word has length 584 [2025-03-08 05:45:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:32,415 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 203 transitions. [2025-03-08 05:45:32,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-08 05:45:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 203 transitions. [2025-03-08 05:45:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2025-03-08 05:45:32,416 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:32,417 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 31, 27, 27, 22, 18, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 13, 13, 13, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:32,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:32,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:32,617 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:32,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1047779244, now seen corresponding path program 14 times [2025-03-08 05:45:32,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123730072] [2025-03-08 05:45:32,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:32,626 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 411 statements into 2 equivalence classes. [2025-03-08 05:45:32,640 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 411 of 411 statements. [2025-03-08 05:45:32,640 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:32,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4876 backedges. 501 proven. 92 refuted. 0 times theorem prover too weak. 4283 trivial. 0 not checked. [2025-03-08 05:45:32,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:32,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123730072] [2025-03-08 05:45:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123730072] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:32,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089339501] [2025-03-08 05:45:32,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:32,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:32,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:32,797 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:32,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 05:45:32,958 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 411 statements into 2 equivalence classes. [2025-03-08 05:45:33,015 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 411 of 411 statements. [2025-03-08 05:45:33,015 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:33,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:33,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:45:33,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4876 backedges. 332 proven. 554 refuted. 0 times theorem prover too weak. 3990 trivial. 0 not checked. [2025-03-08 05:45:33,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4876 backedges. 338 proven. 564 refuted. 0 times theorem prover too weak. 3974 trivial. 0 not checked. [2025-03-08 05:45:34,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089339501] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:34,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:34,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 15] total 24 [2025-03-08 05:45:34,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265370118] [2025-03-08 05:45:34,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:34,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:45:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:34,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:45:34,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:45:34,280 INFO L87 Difference]: Start difference. First operand 148 states and 203 transitions. Second operand has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 14 states have call successors, (24), 1 states have call predecessors, (24), 11 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) [2025-03-08 05:45:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:34,782 INFO L93 Difference]: Finished difference Result 388 states and 593 transitions. [2025-03-08 05:45:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 05:45:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 14 states have call successors, (24), 1 states have call predecessors, (24), 11 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) Word has length 411 [2025-03-08 05:45:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:34,788 INFO L225 Difference]: With dead ends: 388 [2025-03-08 05:45:34,788 INFO L226 Difference]: Without dead ends: 182 [2025-03-08 05:45:34,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 802 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2025-03-08 05:45:34,791 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 79 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:34,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 534 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:45:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2025-03-08 05:45:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2025-03-08 05:45:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 111 states have internal predecessors, (125), 30 states have call successors, (30), 20 states have call predecessors, (30), 21 states have return successors, (75), 34 states have call predecessors, (75), 30 states have call successors, (75) [2025-03-08 05:45:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 230 transitions. [2025-03-08 05:45:34,808 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 230 transitions. Word has length 411 [2025-03-08 05:45:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:34,808 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 230 transitions. [2025-03-08 05:45:34,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 14 states have call successors, (24), 1 states have call predecessors, (24), 11 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) [2025-03-08 05:45:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 230 transitions. [2025-03-08 05:45:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2025-03-08 05:45:34,813 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:34,813 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 36, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 16, 12, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:34,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:35,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-08 05:45:35,017 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:35,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:35,018 INFO L85 PathProgramCache]: Analyzing trace with hash -109995647, now seen corresponding path program 15 times [2025-03-08 05:45:35,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:35,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817924482] [2025-03-08 05:45:35,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:35,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:35,035 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 571 statements into 36 equivalence classes. [2025-03-08 05:45:35,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 106 of 571 statements. [2025-03-08 05:45:35,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 05:45:35,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9482 backedges. 818 proven. 42 refuted. 0 times theorem prover too weak. 8622 trivial. 0 not checked. [2025-03-08 05:45:35,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:35,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817924482] [2025-03-08 05:45:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817924482] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:35,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614236748] [2025-03-08 05:45:35,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:45:35,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:35,084 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:35,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 05:45:35,254 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 571 statements into 36 equivalence classes. [2025-03-08 05:45:35,270 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 106 of 571 statements. [2025-03-08 05:45:35,270 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 05:45:35,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:35,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:45:35,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9482 backedges. 1836 proven. 4 refuted. 0 times theorem prover too weak. 7642 trivial. 0 not checked. [2025-03-08 05:45:35,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9482 backedges. 818 proven. 42 refuted. 0 times theorem prover too weak. 8622 trivial. 0 not checked. [2025-03-08 05:45:36,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614236748] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:36,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-08 05:45:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876829658] [2025-03-08 05:45:36,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:36,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:45:36,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:36,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:45:36,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:45:36,115 INFO L87 Difference]: Start difference. First operand 166 states and 230 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-08 05:45:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:36,169 INFO L93 Difference]: Finished difference Result 308 states and 449 transitions. [2025-03-08 05:45:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:45:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 571 [2025-03-08 05:45:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:36,171 INFO L225 Difference]: With dead ends: 308 [2025-03-08 05:45:36,171 INFO L226 Difference]: Without dead ends: 152 [2025-03-08 05:45:36,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1137 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:45:36,172 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:36,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-08 05:45:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2025-03-08 05:45:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 106 states have (on average 1.1037735849056605) internal successors, (117), 102 states have internal predecessors, (117), 28 states have call successors, (28), 21 states have call predecessors, (28), 17 states have return successors, (53), 28 states have call predecessors, (53), 28 states have call successors, (53) [2025-03-08 05:45:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2025-03-08 05:45:36,181 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 571 [2025-03-08 05:45:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:36,182 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2025-03-08 05:45:36,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-08 05:45:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2025-03-08 05:45:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2025-03-08 05:45:36,200 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:36,200 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 46, 46, 39, 38, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 16, 14, 10, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:36,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:36,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-08 05:45:36,401 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:36,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1827518729, now seen corresponding path program 16 times [2025-03-08 05:45:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:36,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119934546] [2025-03-08 05:45:36,402 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:36,413 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 651 statements into 2 equivalence classes. [2025-03-08 05:45:36,433 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 554 of 651 statements. [2025-03-08 05:45:36,434 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:36,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12404 backedges. 566 proven. 976 refuted. 0 times theorem prover too weak. 10862 trivial. 0 not checked. [2025-03-08 05:45:36,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:36,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119934546] [2025-03-08 05:45:36,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119934546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:36,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291376672] [2025-03-08 05:45:36,720 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:36,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:36,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:36,722 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:36,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 05:45:36,899 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 651 statements into 2 equivalence classes. [2025-03-08 05:45:36,965 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 554 of 651 statements. [2025-03-08 05:45:36,965 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:36,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:36,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:45:36,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12404 backedges. 676 proven. 1254 refuted. 0 times theorem prover too weak. 10474 trivial. 0 not checked. [2025-03-08 05:45:37,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12404 backedges. 676 proven. 1284 refuted. 0 times theorem prover too weak. 10444 trivial. 0 not checked. [2025-03-08 05:45:39,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291376672] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:39,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:39,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 25 [2025-03-08 05:45:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500108157] [2025-03-08 05:45:39,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:39,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 05:45:39,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:39,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 05:45:39,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:45:39,209 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:45:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:39,374 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2025-03-08 05:45:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:45:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) Word has length 651 [2025-03-08 05:45:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:39,376 INFO L225 Difference]: With dead ends: 173 [2025-03-08 05:45:39,376 INFO L226 Difference]: Without dead ends: 158 [2025-03-08 05:45:39,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1325 GetRequests, 1285 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:45:39,377 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:39,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 459 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-03-08 05:45:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2025-03-08 05:45:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 110 states have (on average 1.1) internal successors, (121), 106 states have internal predecessors, (121), 28 states have call successors, (28), 21 states have call predecessors, (28), 19 states have return successors, (53), 30 states have call predecessors, (53), 28 states have call successors, (53) [2025-03-08 05:45:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 202 transitions. [2025-03-08 05:45:39,385 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 202 transitions. Word has length 651 [2025-03-08 05:45:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:39,386 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 202 transitions. [2025-03-08 05:45:39,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-08 05:45:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 202 transitions. [2025-03-08 05:45:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2025-03-08 05:45:39,388 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:39,388 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 34, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:39,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 05:45:39,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:39,589 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:39,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1368584279, now seen corresponding path program 17 times [2025-03-08 05:45:39,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:39,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005979550] [2025-03-08 05:45:39,589 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:39,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:39,599 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 569 statements into 36 equivalence classes. [2025-03-08 05:45:39,629 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) and asserted 498 of 569 statements. [2025-03-08 05:45:39,629 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2025-03-08 05:45:39,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1202 proven. 1130 refuted. 0 times theorem prover too weak. 7081 trivial. 0 not checked. [2025-03-08 05:45:40,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005979550] [2025-03-08 05:45:40,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005979550] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059760750] [2025-03-08 05:45:40,079 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:40,081 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:40,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 05:45:40,270 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 569 statements into 36 equivalence classes. [2025-03-08 05:45:40,360 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) and asserted 498 of 569 statements. [2025-03-08 05:45:40,361 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2025-03-08 05:45:40,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:40,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 05:45:40,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1177 proven. 1149 refuted. 0 times theorem prover too weak. 7087 trivial. 0 not checked. [2025-03-08 05:45:40,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1183 proven. 1167 refuted. 0 times theorem prover too weak. 7063 trivial. 0 not checked. [2025-03-08 05:45:42,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059760750] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:42,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 25] total 31 [2025-03-08 05:45:42,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415698311] [2025-03-08 05:45:42,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:42,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 05:45:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:42,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 05:45:42,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:45:42,520 INFO L87 Difference]: Start difference. First operand 158 states and 202 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 23 states have call successors, (34), 1 states have call predecessors, (34), 13 states have return successors, (41), 20 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-08 05:45:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:43,162 INFO L93 Difference]: Finished difference Result 362 states and 508 transitions. [2025-03-08 05:45:43,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 05:45:43,163 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 23 states have call successors, (34), 1 states have call predecessors, (34), 13 states have return successors, (41), 20 states have call predecessors, (41), 23 states have call successors, (41) Word has length 569 [2025-03-08 05:45:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:43,165 INFO L225 Difference]: With dead ends: 362 [2025-03-08 05:45:43,165 INFO L226 Difference]: Without dead ends: 183 [2025-03-08 05:45:43,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1121 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2025-03-08 05:45:43,171 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 100 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:43,171 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 588 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:45:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-03-08 05:45:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2025-03-08 05:45:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 118 states have internal predecessors, (135), 34 states have call successors, (34), 26 states have call predecessors, (34), 17 states have return successors, (50), 29 states have call predecessors, (50), 34 states have call successors, (50) [2025-03-08 05:45:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 219 transitions. [2025-03-08 05:45:43,190 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 219 transitions. Word has length 569 [2025-03-08 05:45:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:43,191 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 219 transitions. [2025-03-08 05:45:43,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 23 states have call successors, (34), 1 states have call predecessors, (34), 13 states have return successors, (41), 20 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-08 05:45:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 219 transitions. [2025-03-08 05:45:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-08 05:45:43,194 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:43,195 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:43,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:43,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:43,399 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:43,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1396638252, now seen corresponding path program 18 times [2025-03-08 05:45:43,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:43,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393940937] [2025-03-08 05:45:43,399 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:43,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:43,415 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 487 statements into 32 equivalence classes. [2025-03-08 05:45:43,428 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 179 of 487 statements. [2025-03-08 05:45:43,428 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 05:45:43,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 923 proven. 24 refuted. 0 times theorem prover too weak. 5893 trivial. 0 not checked. [2025-03-08 05:45:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393940937] [2025-03-08 05:45:43,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393940937] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195085860] [2025-03-08 05:45:43,576 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:43,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:43,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:43,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:43,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 05:45:43,780 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 487 statements into 32 equivalence classes. [2025-03-08 05:45:43,809 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 179 of 487 statements. [2025-03-08 05:45:43,809 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-08 05:45:43,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:43,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:45:43,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1062 proven. 34 refuted. 0 times theorem prover too weak. 5744 trivial. 0 not checked. [2025-03-08 05:45:43,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1062 proven. 35 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2025-03-08 05:45:44,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195085860] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:44,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:44,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2025-03-08 05:45:44,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807163471] [2025-03-08 05:45:44,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:44,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:45:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:44,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:45:44,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:45:44,865 INFO L87 Difference]: Start difference. First operand 174 states and 219 transitions. Second operand has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 11 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2025-03-08 05:45:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:45,026 INFO L93 Difference]: Finished difference Result 330 states and 422 transitions. [2025-03-08 05:45:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:45:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 11 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) Word has length 487 [2025-03-08 05:45:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:45,028 INFO L225 Difference]: With dead ends: 330 [2025-03-08 05:45:45,028 INFO L226 Difference]: Without dead ends: 169 [2025-03-08 05:45:45,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 961 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:45:45,030 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:45,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 227 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-08 05:45:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2025-03-08 05:45:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 115 states have internal predecessors, (132), 33 states have call successors, (33), 26 states have call predecessors, (33), 16 states have return successors, (43), 27 states have call predecessors, (43), 33 states have call successors, (43) [2025-03-08 05:45:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2025-03-08 05:45:45,040 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 487 [2025-03-08 05:45:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:45,041 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2025-03-08 05:45:45,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 11 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (22), 9 states have call predecessors, (22), 11 states have call successors, (22) [2025-03-08 05:45:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2025-03-08 05:45:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2025-03-08 05:45:45,043 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:45,043 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:45,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:45,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 05:45:45,245 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:45,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:45,246 INFO L85 PathProgramCache]: Analyzing trace with hash -229283391, now seen corresponding path program 19 times [2025-03-08 05:45:45,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:45,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808274448] [2025-03-08 05:45:45,246 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:45,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 501 statements into 1 equivalence classes. [2025-03-08 05:45:45,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 501 of 501 statements. [2025-03-08 05:45:45,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:45,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 797 proven. 177 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2025-03-08 05:45:45,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808274448] [2025-03-08 05:45:45,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808274448] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961291511] [2025-03-08 05:45:45,510 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:45,512 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:45,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 05:45:45,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 501 statements into 1 equivalence classes. [2025-03-08 05:45:45,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 501 of 501 statements. [2025-03-08 05:45:45,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:45,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:45,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:45:45,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1049 proven. 218 refuted. 0 times theorem prover too weak. 5994 trivial. 0 not checked. [2025-03-08 05:45:45,847 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1049 proven. 239 refuted. 0 times theorem prover too weak. 5973 trivial. 0 not checked. [2025-03-08 05:45:47,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961291511] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:47,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:47,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 17] total 23 [2025-03-08 05:45:47,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926105132] [2025-03-08 05:45:47,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:47,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:45:47,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:47,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:45:47,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:45:47,348 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 23 states have internal predecessors, (76), 15 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2025-03-08 05:45:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:47,474 INFO L93 Difference]: Finished difference Result 179 states and 217 transitions. [2025-03-08 05:45:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:45:47,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 23 states have internal predecessors, (76), 15 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) Word has length 501 [2025-03-08 05:45:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:47,476 INFO L225 Difference]: With dead ends: 179 [2025-03-08 05:45:47,476 INFO L226 Difference]: Without dead ends: 169 [2025-03-08 05:45:47,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 986 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:45:47,477 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:47,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 290 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-08 05:45:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2025-03-08 05:45:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 115 states have internal predecessors, (132), 33 states have call successors, (33), 26 states have call predecessors, (33), 16 states have return successors, (39), 27 states have call predecessors, (39), 33 states have call successors, (39) [2025-03-08 05:45:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2025-03-08 05:45:47,485 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 501 [2025-03-08 05:45:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:47,486 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2025-03-08 05:45:47,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 23 states have internal predecessors, (76), 15 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2025-03-08 05:45:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2025-03-08 05:45:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2025-03-08 05:45:47,488 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:47,488 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:47,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:47,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 05:45:47,688 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:47,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 692310468, now seen corresponding path program 20 times [2025-03-08 05:45:47,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:47,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465180977] [2025-03-08 05:45:47,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:47,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 460 statements into 2 equivalence classes. [2025-03-08 05:45:47,718 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 460 of 460 statements. [2025-03-08 05:45:47,718 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:47,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-03-08 05:45:51,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465180977] [2025-03-08 05:45:51,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465180977] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569211464] [2025-03-08 05:45:51,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:45:51,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:51,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:51,291 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:51,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 05:45:51,501 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 460 statements into 2 equivalence classes. [2025-03-08 05:45:51,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 460 of 460 statements. [2025-03-08 05:45:51,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:45:51,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:51,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 271 conjuncts are in the unsatisfiable core [2025-03-08 05:45:51,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-03-08 05:45:51,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-03-08 05:45:53,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569211464] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:53,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:53,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 52 [2025-03-08 05:45:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673223658] [2025-03-08 05:45:53,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:53,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-08 05:45:53,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:53,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-08 05:45:53,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2025-03-08 05:45:53,552 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 27 states have internal predecessors, (63), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) [2025-03-08 05:45:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:53,910 INFO L93 Difference]: Finished difference Result 169 states and 204 transitions. [2025-03-08 05:45:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-08 05:45:53,910 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 27 states have internal predecessors, (63), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) Word has length 460 [2025-03-08 05:45:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:53,911 INFO L225 Difference]: With dead ends: 169 [2025-03-08 05:45:53,911 INFO L226 Difference]: Without dead ends: 0 [2025-03-08 05:45:53,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2025-03-08 05:45:53,912 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:53,912 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2335 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:45:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-08 05:45:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-08 05:45:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 05:45:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-08 05:45:53,913 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 460 [2025-03-08 05:45:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:53,913 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-08 05:45:53,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 27 states have internal predecessors, (63), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) [2025-03-08 05:45:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-08 05:45:53,913 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-08 05:45:53,915 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-08 05:45:53,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 05:45:54,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 05:45:54,118 INFO L422 BasicCegarLoop]: Path program histogram: [20, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:54,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-03-08 05:46:25,982 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-08 05:46:25,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.03 05:46:25 BoogieIcfgContainer [2025-03-08 05:46:25,986 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-08 05:46:25,986 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-08 05:46:25,986 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-08 05:46:25,986 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-08 05:46:25,987 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:57" (3/4) ... [2025-03-08 05:46:25,988 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-08 05:46:25,993 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo2 [2025-03-08 05:46:25,993 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibo1 [2025-03-08 05:46:25,996 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-03-08 05:46:25,997 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-03-08 05:46:25,997 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-08 05:46:25,997 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-03-08 05:46:26,045 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-08 05:46:26,045 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-08 05:46:26,046 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-08 05:46:26,046 INFO L158 Benchmark]: Toolchain (without parser) took 88689.65ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 113.6MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 265.2MB. Max. memory is 16.1GB. [2025-03-08 05:46:26,046 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 226.5MB. Free memory is still 149.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:26,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 145.12ms. Allocated memory is still 142.6MB. Free memory was 113.6MB in the beginning and 102.4MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-08 05:46:26,046 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.00ms. Allocated memory is still 142.6MB. Free memory was 102.4MB in the beginning and 101.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:26,047 INFO L158 Benchmark]: Boogie Preprocessor took 20.35ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 100.7MB in the end (delta: 604.7kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:26,048 INFO L158 Benchmark]: IcfgBuilder took 206.51ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 89.6MB in the end (delta: 10.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-08 05:46:26,048 INFO L158 Benchmark]: TraceAbstraction took 88230.73ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 89.0MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 875.3MB. Max. memory is 16.1GB. [2025-03-08 05:46:26,048 INFO L158 Benchmark]: Witness Printer took 59.57ms. Allocated memory is still 1.5GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 8.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-08 05:46:26,049 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 226.5MB. Free memory is still 149.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 145.12ms. Allocated memory is still 142.6MB. Free memory was 113.6MB in the beginning and 102.4MB in the end (delta: 11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.00ms. Allocated memory is still 142.6MB. Free memory was 102.4MB in the beginning and 101.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.35ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 100.7MB in the end (delta: 604.7kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 206.51ms. Allocated memory is still 142.6MB. Free memory was 100.2MB in the beginning and 89.6MB in the end (delta: 10.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 88230.73ms. Allocated memory was 142.6MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 89.0MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 875.3MB. Max. memory is 16.1GB. * Witness Printer took 59.57ms. Allocated memory is still 1.5GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 8.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 41 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 56.3s, OverallIterations: 28, TraceHistogramMax: 49, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.1s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1126 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1011 mSDsluCounter, 9205 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8333 mSDsCounter, 1047 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9330 IncrementalHoareTripleChecker+Invalid, 10377 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1047 mSolverCounterUnsat, 872 mSDtfsCounter, 9330 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19529 GetRequests, 18673 SyntacticMatches, 154 SemanticMatches, 702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4730 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=25, InterpolantAutomatonStates: 444, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 248 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 39.6s InterpolantComputationTime, 18905 NumberOfCodeBlocks, 13423 NumberOfCodeBlocksAsserted, 270 NumberOfCheckSat, 28267 ConstructedInterpolants, 0 QuantifiedInterpolants, 37518 SizeOfPredicates, 117 NumberOfNonLiveVariables, 15089 ConjunctsInSsa, 594 ConjunctsInUnsatCore, 80 InterpolantComputations, 2 PerfectInterpolantSequences, 351348/387252 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-08 05:46:26,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0